Dental appliance



May 10, 1927- B. JOESCH DENTAL APPLIANCE Filed Ozct. 20, 1924 ma #mw/7655 n' Le.)

Patented May 1G, 1927.

'BERNHARD JOESCI'I, OF ST. .L'QUS,

@Fig-ifi@ MSSOUR.

c. DENTAL APPLIANCE.

Application filed October 20, 1924. Serial No. Illl This invention relates` to improvements in dental appliances and more particularly to an appliance for extraction ot teeth.

An object or' the inver-tion is *to `provide a dental appliance adapted for the extraction of teeth having` one jaw` thereoil equippedfwith a pivoted plate adapted to seat aga-inst the outer `nu and the othery jaw ot whichimpinges against the back surt'ace of the tooth to be extrarted. whereby the tooth is extracted by a forward pull oi the instrument, the plate constituting the pivot point oi the movement.

Another object of the invel'ition is tov provide a dental appliance oi the class de scribed includingcross pivoted clamping' members arranged to receive interchangeable jaw members so that a single pair ot cross .members may be utilized by the interchange of the aws for the extraction of teeth in any posit-ion in the mouth.

Additional advantages of the structure will be apparent from the followingdetailed description taken in connection with the accompanying drawing, in which- Fig. l is a side elevation. j

Fig. 2 is a detail View of the jaw carrying;I the pivoted plate, illustrating` the different positions ot the plate.

Fig. 3 is an end view or' the same member.

Fig. 4 is a view ot' the same member with a different angular adjustment ot the aw.

Fig'. 5 is the same member with another angular adjustment ot the jaw.

F in'. 6 is a view of the impinging` jaw, the angle modiied from that shown .in Fig. l..

Fig. 7 is a further modification of the angle of the impinging` jaw.

Fig, 8 is a face view ot the impinging aw.

Heretofore in the practice of dentistry and particularly the extractionv of teeth the forceps with'which the teeth are drawn are arranged with two clamping impinging jaws and the tooth is extracted by a straight downward or upward pull. K ln order cto reach the teeth in different positions in the mouth different instruments having' the jaws at different angular adjustments have been required. The present invention acts on a diiferent principle of movement in the eX traction operation, utilizing a pivoted pull forward instead of a straight downward or upward pull on the tooth. Furthermore. a single set ot clamping` cross members may be used with interchangeable jaws so that any position in the mouth may be" conveniently reached by the operator.

ln the embodiment oi the invention illustrated in the drawino' the clamping` portion of the .instrument is formed from a pair oi cross members l and 2, the lower enos of which constitute the handle and each haringg tormedthereon a knurled section 3 more conveniently adapting` them for n'ianual manipulation. y

rlhe particular iorm of the pivot connection includes teaming` one of the cross members (in the embodiment shown the member l)` with a spaced portion l through which a straight portion 5 of the other member cfr` tends. Vreieasable pivot screw 6 provides a connection between the two members and serves as a tulcrum for the clamping mein-` bers. The upper end of each ot the members l and 2 is termed with a portion 7 the inner tace of which is offset to receive a matching* face 01"' the Shanks of th-e There are two general forms of jaws that are utilized together to form a pair. one ot which comprises a shank 8 the lower end of which has its outer face oiset to match the portion 7 of the members l and 2, that is to say it can be mounted upon and securely fixed to either ot the members l or 2. the means of attachment comprising screws 9 threaoed through the shank 8 and into the wall of the portion 7. At th-e upper end ot the shank is a round disc 10 having a lug` ll on its back tace, the lug' ll being attached to the upper end of the shank by a pivot connection l2. A rubber cap 13 iits over the dise and the upper end of the shank. Oppositie the disc member is a jaw comprising` a shank ll, the upper end of which is formed with a point l5 and a concave angular recess 16 below the point. The shank lil is desiojned to be releasabiy attached to the portion 'r' ot the respective members l and 2 by the screws 9.

Both the shank 8 and the shank 14 are "made with diiierent angular adjustments? as shown in F e to 7 inclusive. inasmuch as the jaws are interchangeable from the mem bers i and and the shanks are Jformed with the three different angles the single pair ot clamping` jaws utilized with these interchangeable shanks provides an instrument whereby all ot the teeth mayv be con veniently reached for extraction.

The method of use ot the instrument consists in placing the disc covered with the breaking (T h body mi' thv moth :l' :my u pomt :and femm@ The chance of hushmg muy 

